Responses

He is nomaly wearing a communicator on his ear, where the marking is. Since it is the normal place to wear it and work related, it's not strange in any way. And with that he has an excuse to wear a plaster there, too.
In addition Josh doesn't look like a normal omega (Dane is even worse.:D). He always had a very faint scent and with inhibitors the scent is gone.
Like I’ve seen some potholes before, but the biggest plot hole is where they think a bandage right where a marking is is supposed to be like suddenly invisible. Especially on somebody who is supposed to be a beta.